PROCESS FOR PREPARING HIGH PURITY URSODEOXYCHOLIC ACID
申请人:ERREGIERRE S.P.A.
公开号:US20150291651A1
公开(公告)日:2015-10-15
The present invention describes a process for the synthesis of ursodeoxycholic acid wherein the purification of the crude ursodeoxycholic acid (containing approximately 13-15% of chenodeoxycholic acid impurity) takes place first passing through a salification with imidazole and a subsequent purification via “methyl ester”, which allows a finished product with an extremely low content of known “cheno and “litho” impurities to be obtained. The present invention also describes the recovery steps of cholic acid and 3α-hydroxy-7-ketocholanic acid from the mother liquors of process intermediates.